Plank is the imaginary friend of Johnny in the form of a plank of wood. Although he is claimed to be alive, he is never heard or seen moving on screen. However, Jonny seems to be able to understand what he is saying, but this is likely just Jonny's imagination. Ed also thinks that Plank is alive. It is unknown whether Plank really is alive or not due to hints of Plank moving, such as the scene in "Gimme Gimme Never Ed." In the episode, Eddy seems to dislike him for hurting him in various ways. Plank is enrolled in Peach Creek Jr. High and plays on the football team, along with participating in the annual school spelling bee, which he failed for not speaking.
Plank is a yellow piece of wood, he has red circles (for the eyes), blue curve (for the mouth) and cyan dots (for the pupils of his eyes).
Plank is all silent which Jonny is able to make him communicate.
Plank has rotted for years and has bleached to white, half of his mouth and his left eye are wiped off. He now play chess with Jonny. He is seen in Take This Ed and Shove It.